http://forum.lowyat.net/ Tue, 14 Jul 2026 13:36:26 +0800 FeedCreator 1.7.2 http://forum.lowyat.net/topic/5516032 I recently bought a 2 storey corner lot house with windows and sliding doors facing east. The house is still empty as I&#39;m waiting for design from ID, but I&#39;ve tried sleeping on the 2nd floor a few times and found it to be unbearably hot. I bought a cheap temp and humidity sensor and placed it on the 2nd floor, and found that the 2nd floor temperature fluctuate between 32c and 35c. My house already has radiant barrier installed underneath the roof tiles. Recently I have also installed solar panels on the roof, and found that it helped to reduce the 2nd floor temperature by 1-2c (it now fluctuate between 30c and 33c).<br /><br />Now I&#39;m considering to add insulation on the attic, because I&#39;ve read somewhere that for house in hot climate, most of the heat enters through the roof, which explains why adding solar panels helped to reduce the temperature a bit since it shades the roof from sun. The idea is to minimize heat transfer from attic to 2nd floor through the ceiling by adding thick insulation. So far I received quotation from TCL to add 100mm blow in cellulose on top of 2nd floor plaster ceiling for rm4 psf.<br /><br />Basically my goal is to reduce my house temp as much as possible using passive cooling, so that when I add aircond later, they don&#39;t have to work that hard, thus saving more money. I&#39;ve heard about turbine ventilators, which are common here, but from what I understand, it doesn&#39;t play well with aircond, since it will actually pull cold air out as well, so your aircond has to work harder to keep the room cold.<br /><br />Has anyone done something similar before? Does it actually help to reduce house temp? Is the price of rm4 psf about right? hasyimibhar Home Renovations and Interior Design Sun, 30 Mar 2025 00:27:23 +0800